[map-sdk]修改天空盒雾化效果

libraries/mapmodule/src/main/assets/shaders/fMogo_Shader.glsl

@@ -241,8 +241,7 @@ void setLinearFog()
     float distanceFromCamera = length(posInEye-cameraPos);
     if(distanceFromCamera<fogStart)
         return;
-    float fogAlpha=(distanceFromCamera-fogStart)/(fogEnd-fogStart);
-    fogAlpha=clamp(fogAlpha,0.0,1.0)*fogDensity;
+    float fogAlpha = smoothstep(fogStart,fogEnd,distanceFromCamera)*fogDensity;
     fragColor.rgb = mix(fragColor.rgb,fogColor,fogAlpha);
 }
 void setGuideLine(){
@@ -301,8 +300,6 @@ void main()
         if (isShadow)
             setShadow();
     }
-    setLinearFog();
-    setBlur();
     float y = (ndc.y / ndc.w+1.0)*0.5;
     y = smoothstep(0.0,1.0,y);
     if(isDaytime || isMorning || isEvening || isRoadbed || isGreenBelt || isPlane){
@@ -321,4 +318,6 @@ void main()
         }
         fragColor.rgb = mix(fragColor.rgb,c.rgb,c.a);
     }
+    setLinearFog();
+    setBlur();
 }

libraries/mapmodule/src/main/assets/shaders/fSkyBox_Shader.glsl

@@ -16,7 +16,8 @@ void setLinearFog()
 {
     if(!isFogEnable)
     return;
-    float a = clamp(0.0,1.0,(1.0-gl_FragCoord.y/resolution.y)*3.0);
+    float f = gl_FragCoord.y/resolution.y;
+    float a = 1.0-smoothstep(0.75,1.0,f);
     fragColor.rgb = mix(fragColor.rgb,fogColor,fogDensity*a);
 }
 void main()